Shadow home secretary and MP for Hackney North, Diane Abbott, denounced the sign as “disgusting” and “unacceptable”.

Shomrim’s operational supervisor in Stamford Hill, Barry Bard, said the incident was the first known sighting of such a sign, which had caused alarm in the local community due to its meticulous planning.

He said: “The people of Stamford Hill are very sadly used to instances of anti-Semitic hate crime, but most of those times it will be verbal abuse or even assault.

“A lot of the time it will be more of a person-to-person kind of thing, or graffiti, which is more unprofessional.

“The person who planned (this sign) has obviously gone to an effort to cause alarm and distress to local people.”

Labour’s MP for Tottenham, David Lammy, said the incident amounted to “despicable, nasty behaviour that has absolutely no place in our community”.

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